家用热解窑制备的夏威夷果壳活性炭对孔雀石绿染料的吸附性能

IF 1.8 4区材料科学 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Green Materials Pub Date : 2023-01-19 DOI:10.1680/jgrma.22.00096

S. Wattanasiriwech, M. Naradisorn, D. Wattanasiriwech

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引用次数: 3

摘要

活性炭在吸附水中污染的工业染料方面具有重要的应用价值。本研究采用家用热解炉制备夏威夷果壳生物炭(MHC)，然后用磷酸(H3PO4)活化，得到夏威夷果壳活性炭MHAC。初步研究了MHC的两种活化条件:H3PO4 (w/v);1:1和1:3为孔雀石绿(MG)染料的去除率。实验结果分析表明，吸附过程受接触时间、MHAC粒径、MHAC投加量和初始染料浓度的高度控制。使用的MHAC粒度为125-202 m, MHAC投加量为6 g。MG浓度为40 ppm时，去除率可达99%左右;MG浓度为70 ~ 80 ppm时，去除率降至75%左右。在所有初始染料浓度(40-80 ppm)下，用Zn(NO3)2.6H2O浸渍在MHAC表面可以使去除率保持在bb0 99%，因此最大去除率提高到~ 130 mg.g−1。

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Adsorption of the malachite green dye of macadamia husk-activated carbon prepared using a household pyrolysis kiln

Activated carbon has found its key applications in the adsorption of polluted industrial dyes in water. In this work, macadamia husk biochar (MHC) was prepared using a household pyrolysis kiln before being activated with phosphoric acid (H3PO4) to obtain macadamia husk-activated carbon MHAC. A preliminary study was made on the two activation conditions of MHC: H3PO4 (w/v); 1: 1 and 1: 3 for the removal of malachite green (MG) dye. Experimental results analysis disclosed that the adsorption process was highly controlled by time of contact, MHAC particle size, MHAC dosage and initial dye concentration. With the use of the MHAC particle size of 125-202 m, MHAC dosage of 6 g.L−1and 120 and min contact time, the removal efficiency reached >99% at the MG concentration of 40 ppm before being degraded to around 75% at 70-80 ppm MG. Impregnation with Zn(NO3)2.6H2O on the MHAC surface could maintain the removal efficiency to >99% in all initial dye concentrations (40-80 ppm) so the maximum removal capacity was increased to ∼130 mg.g−1.

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来源期刊

Green Materials Environmental Science-Pollution

CiteScore

3.50

自引率

15.80%

发文量

期刊介绍： The focus of Green Materials relates to polymers and materials, with an emphasis on reducing the use of hazardous substances in the design, manufacture and application of products.